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Task switch costs scale with dissimilarity between task rules
Journal article   Peer reviewed

Task switch costs scale with dissimilarity between task rules

Bettina Bustos, J Toby Mordkoff, Eliot Hazeltine and Jiefeng Jiang
Journal of experimental psychology. General, Vol.153(7), pp.1873-1886
05/02/2024
DOI: 10.1037/xge0001598
PMCID: PMC11250929
PMID: 38695804

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Abstract

Cognitive flexibility enables humans to voluntarily switch tasks. Task switching requires replacing the previously active task representation with a new one, an operation that typically results in a switch cost. Thus, understanding cognitive flexibility requires understanding how tasks are represented in the brain. We hypothesize that task representations are cognitive map-like, such that the magnitude of the difference between task representations reflects their conceptual differences: The greater the distinction between the two task representations, the more updating is required. This hypothesis predicts that switch costs should increase with between task dissimilarity. To test this hypothesis, we use an experimental design that parametrically manipulates the similarity between task rules. We observe that response time scales with the dissimilarity between the task rules. The findings shed light on the organizational principles of task representations and extend the conventional binary task-switch effect (task repeat vs. switch) to a theoretical framework with parametric task switches. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
 task switch task representation cognitive control cognitive map

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